Sure, let's work through the problem step-by-step.
1. Understand the given information:
- Total number of people in the museum = 250
- Number of girls = 1
- Number of boys = 10
2. Find out how many people are classified as children (girls and boys):
- Total number of children = Number of girls + Number of boys
- Total number of children = 1 + 10
- Total number of children = 11
3. Determine the number of adults:
- Total number of adults = Total number of people - Total number of children
- Total number of adults = 250 - 11
- Total number of adults = 239
So, the number of adults in the museum is 239.